var li = document.querySelectorAll('#swph');
console.log(li);
var my = document.querySelectorAll('.botw');
for (var i = 0;i < li.length;i++){
    li[i].addEventListener('mouseover',function(){
        this.children[1].style.display = 'block';
    })
    li[i].addEventListener('mouseout',function(){
        this.children[1].style.display = 'none';
    })
}